USRP 2901 text message

Hello everyone, I want to send a text message from one USRP 2901 and read it from another USRP 2901 which is connected to an another computer, my question is which blocks should I use to convert the text which I wrote on the front panel, into a data which USRP 2901 block accepts.

When you say you want to send a text message, are you meaning a generic “send text from one USRP to another” application, or do you mean a Text Message that adheres to cell phone text message standards? The former is much straightforward than the latter. For the former, you’re essentially just doing some packet-based modulated communication. There’s a great Webcast here that walks through the principles: http://www.ni.com/webcast/2353/en/. There’s also an example here that will take text, convert it into modulated packets, and then send it to another USRP to be demodulated and received: http://forums.ni.com/t5/Software-Defined-Radio/Packet-based-Digital-Link/ta-p/3509866.

If you’re looking for help specifically conforming to cellular protocols to send a text message that could be received by a regular cell phone, then there’s a large amount of work that goes on top of these examples. We don’t have any software that works at that level out of the box: while we do have some software toolkits that target cellular standards, like LTE, CDMA2k, WCDMA, they’re all designed at phy layer tests and measurements, not actually building functional communication systems.